Measles, also known as Rubeola, is an infection of the respiratory system caused by a virus, specifically a paramyxovirus of the genus Morbillivirus. Morbilliviruses, like other paramyxoviruses, are enveloped, single-stranded, negative-sense RNA viruses. Symptoms include fever, cough, runny nose, red eyes and a generalized, maculopapular, erythematous rash.
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measles A childhood viral disease manifested as acute febrile illness associated with cough, coryza, conjunctivitis, spots on the buccal mucosa, and rash starting on the head and neck and spreading to the rest of the body.